Dry concentrator.



190.888,15. PATENTED MAY 1Q, i908.

B. C. GILLETTE.

DRY GONCENTRATOR.

APPLIGATION FILED MAY le, 1907,

' mannen carried up by the air-blast.

BEST AVAILABLE C'O'PY BURROUGHS C. VGILIJE'I'lE, OF NEW YORIQN. Y.

7' No. esame.

A To all whom 'it moy conc-em.'

Be it known that .1, BURROnGns C. GIL- Lm'riz, a citizen ofthe United States, residing at the borough of -Manhattam city, county,

Aand State of .New'.York,"have inventedy an ments in or upon .that form of concentratory whichA consists' of anv air-blast trunk' having y portions the one at' an angle to other ,landV connected bye-union. A

My invention provides for the exact regulation `of the 'aircurrents, vthe. ie-working of' `the middlings and of` introducing the material to be operatedupon inv an improved In the device of m improvement, the lower end of the trunk is a'receiving and lelivery hopper adapted to receive the concentrates, that is, the particles too heavy to b e Adjacent to this lower end is an open section/or section of perforated or openwork metal through which.

air'passes intothe tru'nl, and around thissection there is a movable sleeve adjustable to close oil' more or less the section. ,Y The Amaterial to be separated or con en.-l trated passes from a hopper o toan endless conveycr and therefrom into Ie upriv t part of the trunk above the opeti" sectie and a rotar suction vor exhaust fan is located at the distant end of thehigher and upper member of the trunk to draw the lighter material through the trunk and canse the separation by specific gravity, the l'ghter particles rising with the air-blast and the heavier parti-l cles or concentrates falling intothe aforesaid Acoated in the higher and upper portion of the trunk is a series of riiiies for 'arresting the niowmeiit of and one oi' more hingedA plates for receiving the middlings ofthe sepF arated ore and which plates when tipped deliver the mid dlin'gs upon zin-inclined member down which they pass onto an endless conp Specification ofLetters Patent. Appui-sop med my is, i907. semi No'. 374,034.'

. the trunk for the air-blast.

DRY coNcENTRA'ron.

Patented nay i9, isos'.

i being conveyed 'away bythe suction fan andv delivered as waste material. In the drawingi Figure 1 is a vertical section and partial e evation with broken parts representing the device of my im roveinent; Fig'. '2 is an elevation and partie section of the suction or exhaust fanV located at'the distant right hand end of the trunk. 3 is anuelevation at the lower end of the vertical member of the'tiunk. 'F` 44is a vertical cross section on line x, :13,0 Fig. 1, in larger size, and Fig. 5 re resents the modified form of the riiles and plates of my invention. y

f The air-blast; trunk shown in Fig. l is com posed of a vertical member a, a horizontal memberv b and a bent union c. I do' not limit my invention to this relation of the parts as the same is only to be 'limited by one part bein at an angle to the other part.

I employ a receiving and delivery hopper d for the concentrates,` the same having an in-.

clined 'bottoni portion andv slideplatel 2' so through which the concentrates are delivered into a receptacle.- Above lthis h'o per portion the vertical member of the t made with a perforated or open section e through which air enters into the trunk for'the airblast, and a sleeve f of suitable material closely surrounds the perforated or open section 'e and is movable vertically over the sur# face of said section so as more or less to close off the openings and limit theavailable area through which air passes to the interior of This adjustment is provided for and regulated by the' rackbars 3 4, the lower ends of which are secured to the upper portion of the sleeve df 'rand-a shaft 5 passes through the trunk an out'side of the saine with the gears 6 near the respective ends of said shait meshing with the rackbars .'-l 4 and held in place by suitable supporting arms,v there being a crank 7 on one end of the shaft 5 so that b the turning of the crank and .the action o the. gears and rack-hars the sleeve f is raised and lowered to thev desired extent for the performance of its regulating function.

conveyer k. This conveyor h is supported by the shafts h* and 12; the shaft being just inside of the trunk a and the shaft 12 at.A

es f

i t the owcr end of the vertical melllbel` a 7.5 y

lois

"l the. distant end, and I have shown and prefer to employ guiding sides It? to this conveyer I 10..veyer and the amount `of air that will be drawn in'at this point.- Below,the conveyer z, in the trunk-aI-have shownanother gate 'a1 similar to the'gate 9, the oflice of which is f to let in air beneath the incoming pulverized ore to deflect and spread-the sameinto 'the area, and assist in the separation of the same. Y

At thek distantright hand end ofthe hori- 'zontaLor upper member .yb ofthe'air-blast l provide 'a suction or exhaust fan i as shown in Fig. 2,. This fan is'of ordinary 'or well-known constructionand in connection therewith I prefer to employ in the'horizontal or upper member b of ,the trunk a regula gate 10 shown also in Fig. 2 which gater ates-,theavailable discharge aperture'for the'tailings.andy air passing through thefan,

the-,horizontalfmember l) of thetrunk I have 'also-shown a deector-plate b. .This is secured at one 'end to the bottom of the trunk as'aniinclined portion and a portionsubstantially-at right' `angles thereto which passes "through the trunk and may outside In the bottom of the horizontal or upper member bof the trunk I employ aseries ofy spaced apart riiiles 7c. -These are transverse 'strips which are'preferably mounted upon a hinged-plate l. This is readily tipped as shown 1n the cross section Fig. 4. engthwise'oi the member b and beneath the saine I employ an incline m adapted to receive the materials delivered upon the plate Z and arrested by the rifile's c and in turn to deliver the sameupon the endless conveyer n. I have shown and prefer to employ a support for the said endless conveyernl which is forme-d with guiding sides 'nl between which the con- -veyer runs. 'These sides come up closely to the conveyer so as to hold pulverized materials or middlings` delivered thereon and to prevent the sameA spilling over the sides of the conveyerf Fig.5 shows-a modiiied form of these riflles and plates forreceivin the middlings, A

in which k1 re resents theri es. and-Z,i separate hinged-p ates. 'These riies according g to this modification are transverse metal bars fixed in position and the hinged-plates Z1 have separate pivot-shafts Z2 set transversely BEST AVAILABLE-COPY of the trunk member and edges that overlap and under-lap the structure of the riilies at the opposite edges of the lates.

I prefer to employ wit each hinged-plate ll an arm 1 1; T ese arms may be connected together forsimultaneous rmovement or they may be provided with any suitable actuating mechanism for-independent movement.

'Referrin to Fig. 1, o represents a powershaft'with belt-wheels thereon around which extend the, belts 1' and s; the belt r assi to a belt-wheeltupon the shaft l2 of tlie end ess conveyer h and the belt s passing to a beltwheel on the shaft 13 at one end of the endless conveyer n, and t is a chute with the lower end entering the hopper' and the upper widened end coming beneat 1 the delivery 'ed e of the endless conveyer n. y

n the o eration of the arts hereinbefore ldescribed t e suction or e iaust fan i draws the air into the trunk at the perforated or openwork section e ofthe trunk and to a limited extent at the air regulating gatesA 9 and al; and the action of these strong currents of air causes the lighter' particles of the pulverizedpore to be carried up through the trunk with. the air around. the bend into the upper portion and permits the heavier particles of the pulverized ore or other material to settle into the receiving hopper d.v 1n this upper portion o f the trunk the heavier particles or y middlings floating in the air have a chance tosettle and are arrested yby the rifiles c and rest upon the `upper surface of the plate l according to Figs. 1 and 4,- or the plates Z1 according to Fig. 5'; the useless and lighter parfticles' or taili s of said materials passing on, and through t 1c suction fan are delivered at any convenient place for settlement- As these particles come over into the horizontal 105 or uper portion of the trunk they are deiecte above the bottom of the trunk by the h deilectorlate 11; said plate restricting or limiting t e most active area of movement of the air, thus giving the heavier 4p'articles, 110 which are the middlings, al chance to settle upon the plate or plates adjacent to the rifiles and the riiiles an o portunity to stop these particles from lengt iwise movement of this member of the trunk, while the lighter 115 particles or tailings move along to and throughV the fan. Periodically, the niiddlings arrested bv these rfiies and supported by the plate or plates are delivered u on the incline m, from whichthey pass to t e convever n 120 and along the same to the chute t and into the hopper g to .be delivered with the pulverized ore onto the endless conveyor 7L and into the upright member of the trunk, to be separated and worked over again with pulverized ore or other vmaterials introduced for the iirst time. v

In the enlarged section Fig. 4, l. have shown the left hand side of the trunk wall carried down almost'to the surface of the ln- 130 sive to construct,- is

cline m only leaving a discharge a erture for the rniddlings delivered on the inc ine m and a gate m1 for closing 'this opening so that a closed hopper is rovided below the tiltingplate l-for the mi( dlings and intowhich they may be. delivered without risk of admitting air to the upper member of 'the trunk when the plates lare moved to the detriment-of the o eration of the a paratus. lThe gate or s ide 'm1 is operated) when the plates lare closed. l y

As a dry concentrator this device is ere ceedingly simple, is comparatively inexpeneaslly operated and-is exceedingly efiicient.

I claim as my invention.:

1, In a ooncentrator, the combination with an airblast trunk having two members at an angle to one another and a connecting portion, of a conveyerfor` ore or other material'within .the upright portion of the'trunk, a'freceiving and delivery hopper at the lower endof' the trunk, an air inlet section above this hopper and means for-controlling the extent thereof.

Y 2; In acconcentrator, the ccmbination with 'an air-blast trunk having two-members at an angle toV one another and a connecting port1on,of aconveyer for delivering pulverized' ore or other'material within the upright portion of the trunk, a receiving and delivery hopperat the lower end of the trunk, an openwork'se'ction in the trunk formin an air inlet vto the trunk for the' air-blast and ocated abovethis ho per and between the same and the inlet vof tlie conveyor, and a device surronnding the trunk and adjustable along the same for controlling the extent of opening of the air inlet section. y

3. Ina concentrator, the combinati onwith an air-blast trunk having two members at an angle to one another and a connecting portion, of a conveyer for delivering pulverized ore or other material within the upright portion of the trunk, a receiving and delivery hopper at the lower end of the trunk, an openwork section forming an air inlet to the trunk for the air-blast and located above this hopper and' between the same and the inlet of the conve-yer and a sleeve surrounding the upright portion of the trunk at the openwork section and adapted to be vraised and lowered for controlling the extent of opening of the sald o enwork section, rack-bars secih'eil at their ower ends to the upper edge of salti sleeve, a shaft passing through the upright member of the trunk, gears near the respec-r tive ends of the said shaft outside of the up right member of the trunk and meshing with said rack-bars, and a handle for turning the shaft and the gears to raise and lower the sleeve to the desired extent.

4. ln a concentrator, the combination with an air-blast trunk having a vertical, a horizontal and a curved connecting portion, of a delivering pulverized EST AVAILABLE COPY conveyer for delivering pulverized'or other ceiving and deliver)T hopper at tlielower eldw of the vertical portion of the trunk, megs for supplying air for the air-blast to the trunk and forA cont-rolling the extent thereof, a se I ries of riilies inthe bottom of the horizontal' portion of said trunk for arresting the middlings7 an endless conveyer Substantially parallel with the horizontal portion of the trunk, means for delivering the middlings onto the same and means foractuating the endless conveyor.

5. In a concentrator, the combination with an air-blast trunk havingl a vertical, a horizontal and a curved connecting portion, of a conveyer for delivering v ,piilverized. ore or other material within tiievertical portion of the trunk, a gate for regulating the opening adjacent to this conveyenfa hopper for receiving' and delivering the ore to this conveyer, a receiving and delivery ho per at the lower endy of the vertical portion o? the trunk,

means for supplying air to the air-*blast to the trunk -and for controlling the extent thereof,

a series of riffles in the bottoni of the horizontal portieri. of said trunk for arresting the middlings, a tilting-plate in juxtaposition, y

with said riiiles, an inclined member below themiddlings delivered the Vsame receiving from said tilting-plate, a conveyer for receiving the middlings delivered from the incline and means lfor actuating the conveyer.

6. vln a concentrator, the combination with an air-blast trunk having a vertical, a hori zontal and a curved connecting portion, of a conveyer for de hvering pulver-ized o re or other material within the vertical portion of the trunk, a gate for regulating the o ning' adjacent to this conveyer, a hopperA or re- -ceiving and delivering the ore to this conveyer, a receiving and delivery ho per at the lower end o-the vertical portion o the trunk, means forpiipplying air for ther air-,blast to the trunk and for controlling the extent thereof, a series of rifles in the bottom of ,the horizontal portion of said trunk for arresting the middlings an endless conveyor, means for delivering the middlings onto the same, means for'actnating the endless conveyer'and a delector-plate b1 located in the horizontalA member of.y the'A trunk inadvance of the position of theriiles for elevating the material entering the' horizontal member of the trunk to the desired lev'el above the level of the rililes. ,/2" l 7. a concentrator, the combination with aLn air-blast trunk" having a vertical, a horizontal and a curved connecting portion, of a' conveyer for delivering pulverized ore or other material within the vertical portion of the trunk, a gate for regulating the opening 4. o, l v 888,156

4` adjacent to "this conveyer, a hopper for receiving and delivering ore to this convever, a recelvmg and delivery hopper at the lower end 'ofv the vertical portion of the trunk means forsup lying-air for the air-blast to the trunk and for controllingv the extent thereof, a series of rilcs in the bottom of the horizontal portion'ofsaidtrunk for arresting the mi'ddlings, a' ivoted swinging device coming between an( `juxtaposed in relation to *theserie's of rifiles and moans foractuating'sa'id plates simultaneously or separately] aninclined member coming below-saidpiv-` oted swinging device. anda-onto which the midilln'igs are deliveredfgan endlessconveyefr beneath the'lower end .of Said inclined mein-- ber and means for actuating the saine. Y 8 111 "ai concentratior, the combination withjansamblasttrunk havlng a vertical, a

horizontal and a "cuwed connecting portion,

v lower enilgo'f verticalportion o the trunk,

for "controlling the. extentv thereof; a owfriiile'sj in the botto-moi the horizontal portion ofl'saidjtrunk ferial-resting thelmiddlingsLan endlessconveyer,v means for delivering the middlings onto the saine,y means for actnating the endles's co'nve'zyer,4 a cliu'teextending from the forward end of the middlings endless 'conveyer for receiving the middlings therefrom, said chute opening into the' main hopper for deliverin Y o i the middlings therein' and means for simu taneously and from a connnon source'oi power vactuating the respective endless conveyors.

9. In 'a concentrator, the combination with an air-blast trunk having two members at an angle to .one another and a connecting portlon, of 'a conveyer for delivering ulverized'l ore or .other material within t 1e upright portion `.of the trunk, Vmeans at the lower end of. said upright portion for receiving theconcentrates,V means ,for regulating the inlet of' air,`an exhaust fan at the opposite end of the airfblast trunk and a downwardly moving .gate or slidevalve adjacent to said fan for regulating the available exit openings for the middlings. f

10. Ina 'concentraton the combination with an air-blast trunk having two members at an angle tofone another and a connecting portion, of a conveyer -for delivering pulverized ore or other-.materials within the uprightpor-tion of the trunk, means at the lower end of said upright -portion for receiving the concentrates,`means providing for the inlet of a regulatable quant-ity of 'air for the air-blast,

riilles and dischar re plates inthe upper memberof the trunk or receiving the nnddlmgs i the trunkA an BEST AVAILABLE COPY and an adjustable deflector plate adapt-ed to .regulate the available deliverv aperture of the upper member of the trunk and located between the said conveyer and the said ritlies. n

l 11. In Aa concentrator,- the, combination with an air-blast trunk having two members .at an angle to one another ancla connecting port-ion', of a conveyer for delivering ulverized ore or other materials within tie up-.`

right portion of the trunk, means for receiv- Y ing the concentrates, means providirg for.-. the inlet of a regulatable quantity of air for.; the air-blast7 a series of riiiiesin the upper f member ofsaid trunk for arresting thernid- Y dlings and adjacent devices for receiving the iniddlings, a normally closed hopper kinto which the said. middlings may be delivered, a gate by which the said middlings are discharged from the hopper and a conveyer for receiving the discharged iniddlings.

12. ln a concentrator, the combination vwith an air-blast trunk, of a conveyer for de- 1 l r livering pulverized ore or other. material within the trunk,A a receiving and A`deliver)T hopper 'at the lower end of. the trunkyan air v.

controlling the extent thereof. f

13.1In a concentra-tor, the combination with an air-blast trunk, of a onveyer'for dewor Scotti/informing an air inlet to the trunk for. the air-blast and located above this hopper and between the saine and the inlet 'of'.

the conveyer, and a device surrounding the trunk and adjustable along the same for con# trolling the extent of opening of the air inlet section.

14. In. a rconcentrator1 the combination with an air-blast trunk, of a conve-yer for delivering pulverized ore or other material 1 inlet section above this hopper and means fori.

vlivering pulverizedV ore orother material within the trunk, a receiving and delivery.. hopper at the lower end-of the trunk, an open within the trunk, a receiving and delivery i hopper at the lower end of the trunk, an openwork section forming an air inlet to the trunk for the air-blast and located above this hopper and'bet-ween the same and the inlet i of the conveyor and a sleeve surrounding the upright portion of the trunk at the openwork section and adapted to be raised and lowered for controlling the cxtentof opening of the said o enwork section, rack-bars secured at' their ower ends to the upper edge of said slcc-vda shaft passing through the upright member of the trunk, gears near the respective ends of the said' shaft outside. of the upright member of the trunk and meshing with said rack-bars, and a handle for turning the sha-ft and the gears to raise and lower the sleeve to thepdesired extent.

15. In a ,concentrat-or, the combination with an air-blast trunk, of a conveyer for .dehyering pulverized ore or other materials within the trunk, means for .receiving the seance .concentrates, means providingfor the inlet uffa regulatable uantity of air for theairblast, riles and discharge plates in the trunk lWithin the trunk, means for receiving the for v'Receiving the middlingsfand an adjustable' deector. plate adapted to regulate the available delivery'a rture of the trunk andV located between thee said conveyer and the said riiies. i

16. In a .coneentrator, the .combination Withan air-blast trunk, of a conveyer for de` livermg pulverized o re or other materials I conccntrateggmeans between the aforesaid" livering lverizedor othenmaterial within' a receiving actating the endless conveyer. .18. In a ccncentrator, Athe combination' means andthe said lconveyer providing for the-inlet of a.y regulatable quantity of air for `the air-blast,v a sexies of milles in the .trunk for arresting the'middlings and adjacent de- A vices for receiving the middlings, a normally closed hippler into which the vsaid middlings e 'vered, a

ma' `gate b which thezsald m1 dhngs are discharged om .the hopper anc aconveyeror receiving the dischargedV 17. Ina concentrator the combination with an'air blast trunk, of aconveyer for dethe tru a ate in the trunk immediately below the de very'end .of the conveyer for regulating they entrance of'airbelow that vof 3()k the'pixlve'rized material, a hopperfor receiving and:delivering' the ore to this conveyer,

and delivery hopper at the lower end of the air blast trunk, means for sup ly. ing air for 'theair blast to the trunk andp for controlling the extent thereof and'mean's forwitlran'air blast trunk, of a conveyer for de Vlivering pulverizd ore or other materials 4K0 within the trunk, -means for receiving the concentrates, means providing fonthe inlet of Va regulatable uantity of7 air for the air blast, a se`ries of ri es in the trunk for arresti the-middlings v`and adjacent devices for receivingthe middlings, a normally closed liolp'per into which the said' middlingsmay be vered', a gate by which the said middlings are discharged from the hopper and means for receiving the middlings from the hopper. f

19. vIn v a concentrator, 'the combination With devices for separating pulverized ore or as discharged .gate by which the said middlings dlin mid 4BEST AVAILABLE COPY. a

other materials into concentrates and mids, of a series ot riles for arresting the mid lin and adjacentdevices for receiving the mid lings, a normally closed ho per into which theV said midd1` may be d eiiverell! a are 1scharged from the hopper and means for rel c'ei'ving the middlingsas discharged from the/ hopper.

20. a' concentrator, theccombination with. devices for separatingA pulverized ore or other materials into concentrates and iniddlin s, of a series of rifiles for arresting the mid ings, a normally closed hopper adjacent to the rifiies', tilting devices receiving 'the' niiddlings-and ada ted to deliver the same into the normally c osed hopger, whereby the -r 22. In a concentrator, the combination ywith devices for separating pulverized ore' orother materials into concentrates and middlin s,'of a series 'of rifiies for arresti d the midl a trunkand -a normally c osed hoppeiruirmed as a downward prolongation .of the trunk and the hopper provided with an inclined bottom plate anf gate, tilting devices receiving the middlings and adapted to deliver the same into the normally closed hop er, whereby the risk of admitting air whilil the middlmgs are being delivered into the hopper is obvxated, and a means for receiving the middlings as discharged from the hopper through the gate.

lgned by me this 13th day of May 1907.

BURROGHS C. GILLETTE.

Witnesses:

GEO. T. PINCKNEY, E. ZAoHARmsEN. 

